from language_models import *
+## Utility functions
+cat = ''.join
+wcat = ' '.join
+
+
modular_division_table = [[0]*26 for _ in range(26)]
for a in range(26):
for b in range(26):
['afkpuz', 'bglqv!', 'chmrw!', 'dinsx!', 'ejoty!']
"""
split_text = chunks(text, n, fillvalue)
- return [''.join(l) for l in zip_longest(*split_text, fillvalue=fillvalue)]
+ return [cat(l) for l in zip_longest(*split_text, fillvalue=fillvalue)]
def combine_every_nth(split_text):
"""Reforms a text split into every_nth strings
>>> combine_every_nth(every_nth(string.ascii_lowercase, 26))
'abcdefghijklmnopqrstuvwxyz'
"""
- return ''.join([''.join(l)
+ return cat([cat(l)
for l in zip_longest(*split_text, fillvalue='')])
def chunks(text, n, fillvalue=None):
'Jgnnq Yqtnf!'
"""
enciphered = [caesar_encipher_letter(l, shift) for l in message]
- return ''.join(enciphered)
+ return cat(enciphered)
def caesar_decipher(message, shift):
"""Decipher a message with the Caesar cipher of given shift
def affine_encipher_letter(accented_letter, multiplier=1, adder=0, one_based=True):
"""Encipher a letter, given a multiplier and adder
- >>> ''.join([affine_encipher_letter(l, 3, 5, True) \
+ >>> cat([affine_encipher_letter(l, 3, 5, True) \
for l in string.ascii_uppercase])
'HKNQTWZCFILORUXADGJMPSVYBE'
- >>> ''.join([affine_encipher_letter(l, 3, 5, False) \
+ >>> cat([affine_encipher_letter(l, 3, 5, False) \
for l in string.ascii_uppercase])
'FILORUXADGJMPSVYBEHKNQTWZC'
"""
def affine_decipher_letter(letter, multiplier=1, adder=0, one_based=True):
"""Encipher a letter, given a multiplier and adder
- >>> ''.join([affine_decipher_letter(l, 3, 5, True) \
+ >>> cat([affine_decipher_letter(l, 3, 5, True) \
for l in 'HKNQTWZCFILORUXADGJMPSVYBE'])
'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
- >>> ''.join([affine_decipher_letter(l, 3, 5, False) \
+ >>> cat([affine_decipher_letter(l, 3, 5, False) \
for l in 'FILORUXADGJMPSVYBEHKNQTWZC'])
'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
"""
"""
enciphered = [affine_encipher_letter(l, multiplier, adder, one_based)
for l in message]
- return ''.join(enciphered)
+ return cat(enciphered)
def affine_decipher(message, multiplier=1, adder=0, one_based=True):
"""Decipher a message
"""
enciphered = [affine_decipher_letter(l, multiplier, adder, one_based)
for l in message]
- return ''.join(enciphered)
+ return cat(enciphered)
class KeywordWrapAlphabet(Enum):
'bayeszcdfghijklmnopqrtuvwx'
"""
if wrap_alphabet == KeywordWrapAlphabet.from_a:
- cipher_alphabet = ''.join(deduplicate(sanitise(keyword) +
+ cipher_alphabet = cat(deduplicate(sanitise(keyword) +
string.ascii_lowercase))
else:
if wrap_alphabet == KeywordWrapAlphabet.from_last:
last_keyword_letter = sorted(sanitise(keyword))[-1]
last_keyword_position = string.ascii_lowercase.find(
last_keyword_letter) + 1
- cipher_alphabet = ''.join(
+ cipher_alphabet = cat(
deduplicate(sanitise(keyword) +
string.ascii_lowercase[last_keyword_position:] +
string.ascii_lowercase))
"""
shifts = [ord(l) - ord('a') for l in sanitise(keyword)]
pairs = zip(message, cycle(shifts))
- return ''.join([caesar_encipher_letter(l, k) for l, k in pairs])
+ return cat([caesar_encipher_letter(l, k) for l, k in pairs])
def vigenere_decipher(message, keyword):
"""Vigenere decipher
"""
shifts = [ord(l) - ord('a') for l in sanitise(keyword)]
pairs = zip(message, cycle(shifts))
- return ''.join([caesar_decipher_letter(l, k) for l, k in pairs])
+ return cat([caesar_decipher_letter(l, k) for l, k in pairs])
beaufort_encipher=vigenere_decipher
beaufort_decipher=vigenere_encipher
if emptycolumnwise:
return combine_every_nth(transposed)
else:
- return ''.join(chain(*transposed))
+ return cat(chain(*transposed))
def column_transposition_decipher(message, keyword, fillvalue=' ',
fillcolumnwise=False,
if fillcolumnwise:
return combine_every_nth(untransposed)
else:
- return ''.join(chain(*untransposed))
+ return cat(chain(*untransposed))
def scytale_encipher(message, rows, fillvalue=' '):
"""Enciphers using the scytale transposition cipher.
sections = chunks(message, (height - 1) * 2, fillvalue=fillvalue)
n_sections = len(sections)
# Add the top row
- rows = [''.join([s[0] for s in sections])]
+ rows = [cat([s[0] for s in sections])]
# process the middle rows of the grid
for r in range(1, height-1):
- rows += [''.join([s[r:r+1] + s[height*2-r-2:height*2-r-1] for s in sections])]
+ rows += [cat([s[r:r+1] + s[height*2-r-2:height*2-r-1] for s in sections])]
# process the bottom row
- rows += [''.join([s[height - 1:height] for s in sections])]
- # rows += [' '.join([s[height - 1] for s in sections])]
- return ''.join(rows)
+ rows += [cat([s[height - 1:height] for s in sections])]
+ # rows += [wcat([s[height - 1] for s in sections])]
+ return cat(rows)
def railfence_decipher(message, height, fillvalue=''):
"""Railfence decipher.
down_rows = [rows[0]]
up_rows = []
for i in range(1, height-1):
- down_rows += [''.join([c for n, c in enumerate(rows[i]) if n % 2 == 0])]
- up_rows += [''.join([c for n, c in enumerate(rows[i]) if n % 2 == 1])]
+ down_rows += [cat([c for n, c in enumerate(rows[i]) if n % 2 == 0])]
+ up_rows += [cat([c for n, c in enumerate(rows[i]) if n % 2 == 1])]
down_rows += [rows[-1]]
up_rows.reverse()
- return ''.join(c for r in zip_longest(*(down_rows + up_rows), fillvalue='') for c in r)
+ return cat(c for r in zip_longest(*(down_rows + up_rows), fillvalue='') for c in r)
def make_cadenus_keycolumn(doubled_letters = 'vw', start='a', reverse=False):
"""Makes the key column for a Cadenus cipher (the column down between the
index_to_remove = string.ascii_lowercase.find(doubled_letters[0])
short_alphabet = string.ascii_lowercase[:index_to_remove] + string.ascii_lowercase[index_to_remove+1:]
if reverse:
- short_alphabet = ''.join(reversed(short_alphabet))
+ short_alphabet = cat(reversed(short_alphabet))
start_pos = short_alphabet.find(start)
rotated_alphabet = short_alphabet[start_pos:] + short_alphabet[:start_pos]
keycolumn = {l: i for i, l in enumerate(rotated_alphabet)}
rotated_rows = zip(*rotated_columns)
transpositions = transpositions_of(keyword)
transposed = [transpose(r, transpositions) for r in rotated_rows]
- return ''.join(chain(*transposed))
+ return cat(chain(*transposed))
def cadenus_decipher(message, keyword, keycolumn, fillvalue='a'):
"""
rotated_columns = [col[-start:] + col[:-start] for start, col in zip([keycolumn[l] for l in keyword], columns)]
rotated_rows = zip(*rotated_columns)
# return rotated_columns
- return ''.join(chain(*rotated_rows))
+ return cat(chain(*rotated_rows))
def hill_encipher(matrix, message_letters, fillvalue='a'):
# message_chunks = chunks(message, len(matrix), fillvalue=None)
enciphered_chunks = [((matrix * np.matrix(c).T).T).tolist()[0]
for c in message_chunks]
- return ''.join([chr(int(round(l)) % 26 + ord('a'))
+ return cat([chr(int(round(l)) % 26 + ord('a'))
for l in sum(enciphered_chunks, [])])
def hill_decipher(matrix, message, fillvalue='a'):
for slice in transposed_sections:
plaintext_list[slice.index] = message[current_pos:current_pos-slice.start+slice.end][:len(message[slice.start:slice.end])]
current_pos += len(message[slice.start:slice.end])
- return ''.join(plaintext_list)
+ return cat(plaintext_list)
class PocketEnigma(object):
>>> pe.set_position('f')
5
- >>> ''.join([pe.lookup(l) for l in string.ascii_lowercase])
+ >>> cat([pe.lookup(l) for l in string.ascii_lowercase])
'udhbfejcpgmokrliwntsayqzvx'
>>> pe.lookup('A')
''
projects / cipher-tools.git / commitdiff